SIRIUS 3US Thermal Overload Relay for Reliable Motor Overload Protection – 3US5000-0K8K

🔹 Siemens SIRIUS 3US Thermal Overload Relay – 3US5000-0K8K (Motor Protection Relay)

🔹 Product Description

The Siemens 3US5000-0K8K is a thermal overload relay from the SIRIUS 3US series, designed for reliable motor overload protection in low-current industrial applications. It protects electric motors from overload, phase imbalance, and overheating, ensuring safe and efficient operation.

This model belongs to the 3US series (alternative to 3UA/3RU families in some configurations) and is typically used for small motor starter assemblies in industrial automation, pumps, HVAC systems, and control panels.

The relay operates on a bimetal thermal principle, where motor current generates heat in internal elements. When the temperature rises beyond the set threshold, the bimetal strip bends and activates the trip mechanism, disconnecting the motor to prevent damage.

According to Siemens SIRIUS design standards, 3US relays provide current-dependent inverse-time protection, making them suitable for compact motor protection applications with high reliability.

🔹 Key Features

• Genuine Siemens SIRIUS 3US series thermal overload relay
• Model: 3US5000-0K8K
• Designed for low-current motor protection applications
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for small motor starter systems
• Compatible with Siemens contactor-based assemblies
• Reliable inverse-time tripping mechanism
• Compact design for control panel use
• High durability and industrial-grade performance